Climatological Report (Monthly)
Issued by NWS
Issued by NWS
989 CXAK57 PAJK 020606 CLMASI NATIONAL WEATHER SERVICE JUNEAU AK 412 PM AKDT SAT JUN 01 2024 ................................... ...THE SITKA CLIMATE SUMMARY FOR THE MONTH OF MAY 2024... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1944 TO 2024 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 82 05/18/2023 LOW 29 05/06/2002 05/05/1965 HIGHEST 71 05/03 67 4 LOWEST 37 05/21 35 2 AVG. MAXIMUM 52.7 53.3 -0.6 AVG. MINIMUM 43.2 43.0 0.2 MEAN 47.9 48.1 -0.2 DAYS MAX >= 90 0 0.0 0.0 DAYS MAX <= 32 0 0.0 0.0 DAYS MIN <= 32 0 0.2 -0.2 DAYS MIN <= 0 0 0.0 0.0 PRECIPITATION (INCHES) RECORD MAXIMUM 10.04 1982 MINIMUM 0.34 2015 TOTALS 6.30 3.81 2.49 DAILY AVG. 0.20 0.12 0.08 DAYS >= .01 23 16.4 6.6 DAYS >= .10 15 9.7 5.3 DAYS >= .50 3 2.2 0.8 DAYS >= 1.00 1 0.6 0.4 GREATEST 24 HR. TOTAL 1.57 05/09 TO 05/09 DEGREE DAYS HEATING TOTAL 524 522 2 SINCE 7/1 5900 6761 -861 COOLING TOTAL 0 0 0 SINCE 1/1 0 0 0 FREEZE DATES EARLIEST 10/08 LATEST 03/14 .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.9 HIGHEST WIND SPEED/DIRECTION 31/170 DATE 05/09 HIGHEST GUST SPEED/DIRECTION 42/170 DATE 05/09 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 0 RAIN 7 LIGHT RAIN 26 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 16 FOG W/VIS <= 1/4 MILE 0 HAZE 8 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$ ...A WETTER, GENERALLY SLIGHTLY COOLER THAN NORMAL, AND MORE ACTIVE MAY FOR SOUTHEAST ALASKA... A series of frontal systems that moved through the area from the southwest and post-frontal onshore-flow shower activity brought plenty of rainfall, cloud-cover, and marginally cooler temperatures to Southeast Alaska for the month of May, overall. There were a few breaks during the month with warmer, drier, and sunnier weather, but not enough to compensate for the generally active weather pattern. As for broken or ties records, Sitka Airport broke their old record high temperature of 66 degrees with 71 degrees on May 3rd. The old record was set in 2014. On that same day, Juneau Airport set a new record high temperature of 69 degrees. That broke their old record of 65 degrees, which was set back in 1997. On May 9th, Juneau Airport broke their old 24-hour rainfall record of 0.66 inches with 1.64 inches. The old record was set back in 1976. On that same day, Sitka Airport set a new 24-hour rainfall record of 1.57 inches, which broke their old record of 0.98 inches, which was set back in 1964. During a clear, dry, and calm night that allowed for good radiational cooling on May 21st, Sitka Airport tied their record low temperature of 37 degrees, which was originally set back in 1980. Finally, on the last day of the month, a strong frontal system pushed through with a healthy plume of moisture associated with it, which caused widespread moderate to heavy rainfall for the day for the Southern Panhandle. This caused Ketchikan Airport to break their old 24-hour rainfall record of 3.21 inches, which was set back in 1970. The new record is 3.56 inches. Chambers $$